Did Ibn Baz state that shirk/kufr is the only sin that nullifies all good deeds, with the exception of raising one's voice above that of the Prophet (peace be upon him), which applied during his lifetime? And was raising one's voice above his a form of kufr in itself, or a sin that leads to kufr if it resulted in disrespect towards the Prophet (peace be upon him)? And do any of the scholars from among the people of Sunnah and Jama'ah believe that raising one's voice above that of the Prophet (peace be upon him) was an act, other than major kufr, that nullifies all good deeds?

Raising one's voice above the voice of the Prophet, peace and blessings be upon him, is impermissible because it is a disobedience that could lead to disbelief (kufr), which nullifies one's deeds, similar to insulting or disrespecting him. Or, this disobedience might nullify some good deeds, such as nullifying the righteousness and proper etiquette due to him, peace and blessings be upon him.

The complete nullification of all deeds only occurs through apostasy from Islam. However, the nullification of some deeds can occur due to sins that are less than disbelief, such as how boasting nullifies charity and usury nullifies jihad.